Drilling and tapping machine.



PATENTED AUG. 2, 1904.

O. C. NEWTON.

DRILLING AND TAPPING MACHINE.

APPLICATION FILED JAN. 26, 1901.

4 SHEETSSHBBT 1.

N0 MODEL.

! IZUCEZEYVF marks crj/wlam. 2 fus- (izforrzepfii H7 Twi 257w fi mdwaNo. 766,723. PATENTED AUG. 2, 1904. G. C. NEWTON.

DRILLING AND TAPPING MACHINE.

APPLICATION FILED JAN. 26, 1901.

N0 MODEL. 4 SHEETS--SHEBT 2.

%%Wv VX No. 766,723. PATENTED AUG. 2, 1904.

0. o. NEWTON. DRILLING AND TAPPING MACHINE.

APPLIOATION FILED JAN. 26, 1901.

H0 MODEL. 4 SHEETS-SHEET 3.

wan M No. 766,723. PATENTED AUG. 2, 1904. C. G. NEWTON. DRILLING ANDTAPPING MACHINE. Y

APPLIOATION FILED JAN. 26, 1901.

N0 MODEL. 4 BHEETB-SHBET 4.

Mm WM Patented August 2, 1904.

UNITED STATES PATENT OEEIcE.

CHARLES C. NEWVTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THENEWTON MACHINE TOOL \VOR-KS, INCORPORATED, OF PHILADEL- PHIA,PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

DRILLING AND TAPPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 766,723, dated August2, 1904.

Application filed January 26,1901. Serial No. 44,867. LNo modelfi To aZZwhom it may concern.-

Be it known that 1, CHARLES C. NEWTON, a citizen of the United States,residing in Phila delphia, Pennsylvania, have invented certain 5Improvements in Drilling and Tapping Machines, of which the following isa specification.

drilling and tapping machine.

Fig. 2 is a vertical sectional view on the line 2 2, Fig. 1. Fig. 3 1s avertical sectional view on the line 3 3, Fig. 1. on the line L I, Fig.3.

plan view on the line 5 5, Fig.

Fig. at is a sectional plan view Fig. 5 1s a sectional 3; and Fig. 6

is a view of a detail of my invention.

A is the support upon which the frame B, carrying the drill-spindle andthe tapping-spindle, is mounted. suitable form.

This support can be of any I have shown in the drawings a support havingflanges adapted to grooves in the back of the frame B, so that the framecan slide on the support and yet will be held rigidly thereto when atrest.

This support may form the arm of a radial drill or maybe a cross-barsuitably supported for carrying any number of frames B. On the supportis a rack a, with which gears a pinion a on the shaft A, mounted inbearings in the frame B and provided with a hand-wheel a, so that byturning this hand-wheel (4 either the tappingspindle or thedrilling-spindle can be moved over the work. An indicator-hand a on thewheel is preferably used in connection with a pin (0*, projecting fromthe frame B, so that the position of the frame can be accuratelydetermined by alining the hand with the pin,

as will be readily understood.

and E is the tapping-spindle.

The spindles in the present instance are so spaced that the distancebetween the center of one spindle and the center of the other is equalto one revolution of the hand-wheel (6 so that when the hand-wheel isturned one full revolution the drill-spindle can be moved clear of thework and the tzwping-spindle can be moved directly above the work and inposition to tap the thread in the hole drilled by the drill carried bythe spindle D.

C is the driving-shaft. On this drivingshaft is a three-step cone-pulleya and a spiral gear a, which meshes with a spiral gear (Z, adapted to abearing in the upper end of the frame B and confined thereto by ascrew-pin (Z The spiral gear (1 is also splined to the spindle D, sothat the spindle must turn with the gear, but can slide longitudinallyin it.

Splined to the spindle D is a hub D, having a gear-wheel J on one endand the pinion (1 cut in the hub at the opposite end, as clearly shownin Figs. 1 and 3, and loose on the spindle E is a gear-wheel a, withwhich the wheel (P meshes. This wheel a is supported by a projection 7;on the frame B. The pinion (Z on the huh I) meshes with an intermediatepinion f on the stud F, Fig. 5, and this pinion fin turn meshes with agear-wheel e loose on the spindle E and supported by the frame B.

Between the wheels 5 and e on the spindle E is a clutch-sleeve E, havingteeth in its upper and lower faces, and on the under side of the wheel care teeth with which the upper teeth of the clutch E may engage, and inthe upper side of the gear-wheel are teeth with which the teeth on theunder side of the clutch may engage. The clutch-sleeve is controlled bya lever E", Fig. 2, and can be locked in either of its three positionsby a pin 6", entering holes in the segment, as clearly shown in Fig. 2.\Vhen the clutch-sleeve is in themid-position, as shown in the drawings,the tapping-spindle is at rest. \Vhen the clutchsleeve is raised toengage with the wheel a, the spindle E turns at a quick speed similar tothe drill, and this speed is used when it is desired to back out the tapafter the article has been threaded, while when the sleeve is clutchedto the gear-wheel e the tap-spindle E is driven slowly. This gearing isused when the tap is cutting the thread in the article.

The upper end (Z of the drill-spindle is reduced, and on this reducedportion of the spindle is a sleeve G, on which are rack-teeth g, meshingwith the pinion g on the shaft g mounted in hearings in the extension Bof the frame B. On this shaft is a worm-wheel g meshing with the worm gon the diagonal shaft G, extending within easy reach of the operator andhaving at its lower end a handwheel 9 On turning this shaft thedrillspindle can be raised or lowered to any position desired.

On the shaft H, mounted in hearings in the frame B, is a three-stepcone-pulley h, and this cone-pulley is belted to the cone-pulley 0 onthe'shaft O, and on the opposite end of the shaft H is a worm ii,meshing with the wormwheel if on the cone b loose on the shaft G, asshown in Fig. 6. Mounted on the shaft G is a sleeve having a taperedcavity fitting the cone.

Extending longitudinally into one end of the shaft G is a shifting rodI, having a pin 71, which passes through a slotin the shaft and engagesthe cone This rod I has at its lower end an operating-disk 21', engagingthe threaded end of the shaft G, so that on turning this disk 2" thecone if will be thrown into frictional contact with the wheel 7& and theshaft Gr will be turned, and consequently will feed the spindle Dautomatically as it is rotated. By turning the rod I in the oppositedirection the cone 7?) will be released and the automatic feed willstop, and the spindle can then be fed, if desired, by turning thehandwheel 9 On the lower end of the sleeve G is a collarj, and pivotedto this collar is a counterbalancing-arm J pivoted at j to a link J,pivoted at f to the frame B. At the outer end of this arm J is a weightJ This weight counterbalances the spindle D.

The end of the spindle E is reduced and on this end is a sleeve k,pivoted to which is a lever K. This lever K is pivoted at it" to a linkK, pivoted at k to the frame of the machine and has acounterbalancing-weight K Attached to an extension of the arm K is adepending bar H, which is within easy reach of the operator.

So it will be seen by the above-described mechanism that the articleplaced on the table of the drill can be secured in position and firstdrilled by operating the mechanism connected with the drill-spindle Dand then after the work has been drilled and the spindle returned clearof the work by turning the hand-wheel a one complete revolution in thepresent instance the drill-spindle D will be moved away and thetapping-spindle E will be moved directly in position in line with theWork and then by forcing down the spindle by catching the handhold Z0and shifting the clutch by the lever E the tap can be entered into thework and then as soon as the tap has entered it will feed itself and cutthe desired thread. When the thread has been cut the distance required,the clutch-sleeve is reversed, reversing the direction of rotation ofthe spindle, and the tap will be backed out of the work and the work canbe detached from the table and a new piece put in position. In themeantime the hand-wheel a can be turned so as to bring the drill-spindleD again in line with the work.

I claim as my invention 1. The combination in a combined drilling andtapping machine of a support, a frame mounted thereon, means forshifting the frame, a drill-spindle and a tap-spindle mounted on theframe, means for driving said spindles and a support upon which thearticle to be drilled and tapped is secured, said means for shifting theframe including a rotatable device having an indicator with a relativelyfixed piece placed to coact with said indicator, the parts being soproportioned that a certain number of complete revolutions of therotatable device will carry the frame from the drilling to the tappingposition, substantially as described.

2. The combination of a support, a frame arranged to slide thereon, arack on the support, a shaft mounted in bearings on the frame, a pinionon the shaft meshing with the rack, a drill-spindle and a tap-spindlemounted on the frame, means for driving said spindles, an operatingdevice on the shaft, an indicator carried by the shaft, 2. pinprojecting from the frame and placed to coact with said indicator, theparts being so proportioned that a certain number of completerevolutions of the rotatable device will carry the frame from thedrilling to the tapping position, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

(JHARLES C. NEWTON.

